装配式斜支撑节点钢框架抗连续倒塌能力评价  

THE EVALUATION OF CAPACITY TO RESIST PROGRESSIVE COLLAPSE OF PREFABRICATED STEEL FRAME STRUCTURE WITH INCLINED SUPPORT JOINTS

作　　者：舒兴平[1] 毛家喜 袁智深[2] 卢倍嵘[3] 

机构地区：[1]湖南大学土木工程学院钢结构研究所,长沙410082 [2]中南林业科技大学土木工程与力学学院,长沙410004 [3]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《工业建筑》2015年第10期13-17,35,共6页Industrial Construction

基　　金：国家自然科学基金项目(51278178);湖南省工程建设产学研结合创新计划项目(KY201125)资助

摘　　要：结构发生连续倒塌的机理比较复杂,国内外到目前为止没有统一的结构抗连续倒塌能力评价标准。通过3个4跨5层装配式斜支撑节点钢框架结构算例,验证了日本《高冗余度钢结构倒塌控制设计指南》中抗连续倒塌能力评价指标对装配式斜支撑节点钢框架结构的适用性。以国内湘阴远大城9层装配式斜支撑节点钢框架公寓B9为研究对象,采用拆除构件法分别拆除角柱、短边中柱、长边中柱和内中柱,采用经验证的能力评价指标进行抗连续倒塌能力评价。结果表明:9层装配式斜支撑节点钢框架结构在拆除角柱工况下,剩余结构抗连续倒塌能力最好;拆除内中柱下,剩余结构抗连续倒塌能力相对较差,桁架梁在结构抗连续倒塌分析中承载力储备要低于柱构件。There are no unified assessment standards of progressive collapse due to the complex mechanism of progressive collapse both at home and abroad so far.The adaptability of the evaluation index of antiprogressive collapse capacity specified by Guidelines for Collapse Control Design of Steel Structures with High Redundancy of Japan to the prefabricated steel frame structures with inclined support joints was verified by 3 examples of 4-span and 5-story prefabricated steel frame structures with inclined support joints.Based on the subject of a nine-story prefabricated steel frame structure with inclined support joints, corner column, short side middle column, long side middle column and inside middle column were removed with the alternative load path method, the performance evaluation of anti-progressive collapse was conducted with performance evaluation method raised above, the result showed that structure’ s performance of resisting progressive collapse turned out to be able to meet the need, the structure’ s anti-progressive collapse performance after removing corner column was much better than that of removing inner column. In addition, the safety margin of trussed beam was lower than that of the column.

关 键 词：装配式斜支撑节点钢框架 连续倒塌 评价指标 能力评价 

分 类 号：TU391[建筑科学—结构工程]